rock-5-itx: drop pcie3 refclk in mainline u-boot dtsi to fix NVMe boot

U-Boot v2026.04 has no driver for the "gated-fixed-clock" used by
pcie30_port{0,1}_refclk, so clk_get_bulk() returns -ENODEV and NVMe is
unreachable from SPI. Keep only CRU clocks for pcie3x4/pcie3x2; the
PI6C oscillator stays powered via vcc3v3_mkey (already always-on).

Signed-off-by: SuperKali <hello@superkali.me>

Author: SuperKali

patch/u-boot/v2026.04/board_rock-5-itx/0001-arm-dts-rockchip-rock-5-itx-drop-pcie-refclk-from-u-boot-dtsi.patch

@@ -0,0 +1,66 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: SuperKali <hello@superkali.me>
+Date: Mon, 18 May 2026 19:30:00 +0000
+Subject: arm: dts: rockchip: rock-5-itx: drop pcie3 refclk from u-boot dtsi
+
+The rk3588-rock-5-itx.dts wires the PI6C 100MHz oscillator into the
+pcie3x4 and pcie3x2 clocks list as pcie30_port{0,1}_refclk, with
+compatible "gated-fixed-clock". U-Boot v2026.04 does not implement
+that compatible, so clk_get_by_index() returns -ENODEV (-19) on those
+phandles and clk_get_bulk() in pcie_dw_rockchip aborts:
+
+  pcie_dw_rockchip pcie@fe150000: Can't get clock: -19
+  pcie_dw_rockchip pcie@fe160000: Can't get clock: -19
+
+NVMe and SATA boot from SPI are therefore unreachable.
+
+Override &pcie3x4 and &pcie3x2 in the U-Boot dtsi to keep only the
+CRU-provided clocks. vcc3v3_mkey is already pinned regulator-always-on
+in this file and is the same regulator node as vcc3v3_pi6c_05, so the
+PI6C oscillator stays powered and the "ref" input ticks regardless of
+U-Boot's clock setup. The kernel keeps the full clocks list from its
+own DTB and is unaffected.
+
+Signed-off-by: SuperKali <hello@superkali.me>
+---
+ arch/arm/dts/rk3588-rock-5-itx-u-boot.dtsi | 20 ++++++++++
+ 1 file changed, 20 insertions(+)
+
+diff --git a/arch/arm/dts/rk3588-rock-5-itx-u-boot.dtsi b/arch/arm/dts/rk3588-rock-5-itx-u-boot.dtsi
+index 111111111111..222222222222 100644
+--- a/arch/arm/dts/rk3588-rock-5-itx-u-boot.dtsi
++++ b/arch/arm/dts/rk3588-rock-5-itx-u-boot.dtsi
+@@ -4,6 +4,7 @@
+  */
+ 
+ #include "rk3588-u-boot.dtsi"
++#include <dt-bindings/clock/rockchip,rk3588-cru.h>
+ 
+ &fspim2_pins {
+ 	bootph-pre-ram;
+@@ -20,3 +21,22 @@
+ &vcc3v3_mkey {
+ 	regulator-always-on;
+ };
++
++/* Drop pcie30_port{0,1}_refclk: U-Boot has no gated-fixed-clock driver. */
++&pcie3x4 {
++	clocks = <&cru ACLK_PCIE_4L_MSTR>, <&cru ACLK_PCIE_4L_SLV>,
++		 <&cru ACLK_PCIE_4L_DBI>, <&cru PCLK_PCIE_4L>,
++		 <&cru CLK_PCIE_AUX0>, <&cru CLK_PCIE4L_PIPE>;
++	clock-names = "aclk_mst", "aclk_slv",
++		      "aclk_dbi", "pclk",
++		      "aux", "pipe";
++};
++
++&pcie3x2 {
++	clocks = <&cru ACLK_PCIE_2L_MSTR>, <&cru ACLK_PCIE_2L_SLV>,
++		 <&cru ACLK_PCIE_2L_DBI>, <&cru PCLK_PCIE_2L>,
++		 <&cru CLK_PCIE_AUX1>, <&cru CLK_PCIE2L_PIPE>;
++	clock-names = "aclk_mst", "aclk_slv",
++		      "aclk_dbi", "pclk",
++		      "aux", "pipe";
++};
+-- 
+Armbian
+